Learn HVAC Free

Start with HVAC: Heat Pump and Lines Install Ep.98 (25 min, Essential Craftsman), then Why Are Capacitors on Motors? What is Capacitive Reactance and Inductive Reactance? (21 min, Electrician U). All 36 lessons here are free, from the teachers' own official uploads. You'll need refrigerant manifold gauge set, hvac multimeter with clamp, epa 608 study guide and a few more basics (about $175 of kit). The book to keep beside you: Refrigeration and Air Conditioning Technology by William C. Whitman.

What you'll need

Refrigerant manifold gauge set: Read system pressures.
HVAC multimeter with clamp: Amps, volts, capacitance.
EPA 608 study guide: Pass certification first time.
Fin comb set: Straighten condenser fins.

Lessons

HVAC: Heat Pump and Lines Install Ep.98 (25 min, Essential Craftsman, Intermediate)
Why Are Capacitors on Motors? What is Capacitive Reactance and Inductive Reactance? (21 min, Electrician U, Beginner)
Installing a Mini Split at a Commercial Building. (15 min, Electrician U, Intermediate)
MASTERING Residential HVAC (14 min, Build Show Network, Intermediate)
HVAC and Hydronic Heating Behind a High-Performance Home (25 min, Build Show Network, Intermediate)
Understanding Heat Pumps | Future House (11 min, This Old House, Intermediate)
Dual Fuel HVAC (6 min, This Old House, Intermediate)
Heat Pumps, Branch Boxes & Better Comfort (17 min, Build Show Network, Intermediate)
How to Clean and Maintain Your Mini Split (6 min, This Old House, Intermediate)
HVAC Strategy ft. Ross Trethewey (20 min, Build Show Network, Intermediate)
Why is Furnace Maintenance Important? (5 min, This Old House, Intermediate)
Stop Value-Engineering Your HVAC — Do This Instead (11 min, Build Show Network, Intermediate)
AIR to Water – Atypical HVAC (9 min, Build Show Network, Intermediate)
All About Smart Thermostats (6 min, This Old House, Intermediate)
NO COMPROMISE Ductwork - the Art of Airflow (19 min, Build Show Network, Intermediate)
Stop Building Attics Wrong: A Better Way to Handle HVAC (16 min, Build Show Network, Intermediate)
Common Cause for Noisy HVAC (5 min, This Old House, Intermediate)
Good Walls Create Great HVAC (18 min, Build Show Network, Intermediate)
How to Hide Ductwork Under Slab (5 min, This Old House, Intermediate)
Why HVAC Design Matters More Than the Equipment (12 min, Build Show Network, Intermediate)
The Smart HVAC Approach for Remodels and Additions (8 min, Build Show Network, Intermediate)
Basement Radiant Heat: Insulation, Tubing & Boiler Planning (9 min, Build Show Network, Intermediate)
Beyond HVAC Equipment - Building Performance (11 min, Build Show Network, Intermediate)
From Rough-In to Running: Quilt Mini Split Installation (Part 2) (11 min, Build Show Network, Intermediate)
I've Never Seen ANYTHING Like This | Combi Boiler Install (10 min, Roger Wakefield, Intermediate)
Klein CL450 Differential Temperature HVAC Meter Review (14 min, Sparky Channel, Intermediate)
Klein Tools CL380 AC/DC Digital HVAC Clamp Meter, 400A Auto-Ranging (10 min, Sparky Channel, Intermediate)
13 Reasons WHY You SHOULDN'T Be an HVAC Tech (8 min, Roger Wakefield, Intermediate)
Eric Hates Combi Boilers (30 min, Build Show Network, Intermediate)
Fluke 902 FC HVAC Clamp Meter with Review by Expert Sean and Demo by Bill (16 min, Sparky Channel, Advanced)
Get a Combi Boiler...It could save you $1,000's (8 min, Roger Wakefield, Intermediate)
Tankless Tech Meets Forced Air - A New HVAC Approach | Eric Aune (9 min, Build Show Network, Intermediate)
How-To Workshops - How to Install a Thermostat (33 min, The Home Depot, Intermediate)
Why We Keep Ductwork Inside the Building Envelope (10 min, Build Show Network, Intermediate)
What a Pro looks for in a Minisplit Stands (17 min, Build Show Network, Intermediate)
Best Air Compressors For Your Project (4 min, The Home Depot, Intermediate)

Books on HVAC

Refrigeration and Air Conditioning Technology by William C. Whitman - View on Amazon
HVAC Licensing Study Guide by Rex Miller - View on Amazon